问题
I am trying to implement a custom tree mode in gtkmm (reason for doing this is to show rows from a database using some pageination). I habe implemented all vfunc-methods, but i still get following errors:
glibmm-CRITICAL **: Glib::Interface::Interface(const Glib::Interface_Class&): assertion `gobject_ != 0' failed
GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed
On instantiation I have following code:
ModelTracks::ModelTracks(Library* library_ptr)
: Glib::ObjectBase(typeid(ModelTracks)),
Gtk::TreeModel(),
_library_ptr(library_ptr) {
_sort_direction[0] = true;
_sort_direction[1] = true;
_sort_direction[2] = true;
_sort_direction[3] = true;
_sort_order[0] = 0;
_sort_order[1] = 1;
_sort_order[2] = 2;
_sort_order[3] = 3;
}
Can someone help me out or has an working example of a custom Gtk::TreeModel?
回答1:
Try to initialize Glib::Object before Gtk::TreeModel.
ModelTracks::ModelTracks(Library* library_ptr) :
Glib::ObjectBase(typeid(ModelTracks)),
Glib::Object(),
Gtk::TreeModel(),
_library_ptr(library_ptr)
{
_sort_direction[0] = true;
_sort_direction[1] = true;
_sort_direction[2] = true;
_sort_direction[3] = true;
_sort_order[0] = 0;
_sort_order[1] = 1;
_sort_order[2] = 2;
_sort_order[3] = 3;
}
来源:https://stackoverflow.com/questions/14578416/implementing-a-custom-gtkmm-treemodel